Table 2.
Incidence rates and hazard ratios for suicide by PTSD status.
| Crude mortality rate1 | Hazard ratios (95% CI) | ||||
|---|---|---|---|---|---|
| Rate | 95% CI | Unadjusted | Adjustment 12 | Adjustment 23 | |
| Total | 12•9 | (12•6–13•2) | |||
| PTSD | |||||
| No | 12•6 | (12•3–12•9) | 1 | 1 | 1 |
| Yes | 53•9 | (46•8–62•1) | 4•28 (3•70–4•94) | 5•36 (4•64–6•20) | 2•16 (1•86–2•50) |
| Men | 67•2 | (53•1–85•1) | 3•81 (3•00–4•83) | 3•96 (3•12–5•03) | 1•67 (1•31–2•12) |
| Women | 48•5 | (40•6–57•9) | 6•85 (5•70–8•23) | 6•74 (5•61–8•09) | 2•61 (2•16–3•14) |
| LRT test Χ2 for interaction (df); p-value | 15•3 (1); 0•0001 | 12•5 (1); 0•0004 | 8•8 (1); 0•003 | ||
| Broadly-defined PTSD4 | |||||
| No | 12•5 | (12•2–12•8) | 1 | 1 | 1 |
| Yes | 62•5 | (55•3–70•6) | 4•93 (4•35–5•58) | 6•11 (5•38–6•93) | 2•50 (2•19–2•84) |
| Men | 89•3 | (74–107•8) | 5•01 (4•14–6•06) | 5•14 (4•25–6•23) | 2•23 (1•84–2•71) |
| Women | 51•4 | (43•8–60•3) | 7•26 (6•14–8•58 | 7•10 (6•01–8•39) | 2•74 (2•32–3•25) |
| LRT test Χ2 for interaction (df); p-value | 8•3 (1); 0•004 | 6•3 (1); 0•01 | 2•6 (1); 0•11 | ||
LRT: likelihood ratio test; df: degrees of freedom; PTSD: post-traumatic stress disorder; 95% CI: 95% confidence intervals.
1 per 100,000 person-years.
2 Adjusted for current age, natal sex (except in stratified analyses), country of origin, population density and deprivation.
3 Adjusted for variables listed in Adjustment 1, previous major depression or anxiety disorders, bipolar disorder, non-affective psychotic disorder, previous non-fatal suicide attempts and parental history of severe mental illness.
4 See first sensitivity analysis for definition.